Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d9808b6b89135c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 06:29:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 93afb9f77f2ee055506af34f2bb72a8d SHA-1: a150dae2ae6d6e0b1fa3a96c060f19afcd36f28d SHA-256: 45d9808b6b89135c9d6ef28fc98393305ceaa07f1fe36383c7e2df2a4d504343
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. The primary link redirects to a known malicious infrastructure, and the document body is filled with SEO-optimized links to other PDFs hosted on a suspicious domain, suggesting a link farm for malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection and download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/835599320/freer-pro-tiktok-fans-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/hack-r2d-money-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-robux-no-hack-or-cheat-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-rush_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-speed-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/go-throug-roblox-download-hack_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-do-the-frog-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000327e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327E 22364 bytes
SHA-256: 802e8786b0de28e8a968ad1480efd0d5c1f86b7e8dd297711b660f7a3e117133
font_01_sfnt_off00006446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 18128 bytes
SHA-256: 928591a89a078119ccc9f591d696700f7bb8d4d18c6648f681a52a6d4ad7cdb7

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